/*
// <copyright>
// dotNetRDF is free and open source software licensed under the MIT License
// -------------------------------------------------------------------------
// 
// Copyright (c) 2009-2017 dotNetRDF Project (http://dotnetrdf.org/)
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is furnished
// to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// </copyright>
*/

using System;
using VDS.RDF.Query.Spin.LibraryOntology;
using VDS.RDF.Query.Spin.SparqlUtil;
using VDS.RDF.Query.Spin.Util;

namespace VDS.RDF.Query.Spin.Model
{
    internal class ServiceImpl : ElementImpl, IService
    {

        public ServiceImpl(INode node, SpinProcessor spinModel)
            : base(node, spinModel)
        {

        }


        public Uri getServiceURI()
        {
            IResource s = getResource(SP.PropertyServiceURI);
            if (s != null && s.isUri())
            {
                IVariable variable = SPINFactory.asVariable(s);
                if (variable == null)
                {
                    return s.Uri;
                }
            }
            return null;
        }


        public IVariable getServiceVariable()
        {
            IResource s = getResource(SP.PropertyServiceURI);
            if (s != null)
            {
                IVariable variable = SPINFactory.asVariable(s);
                if (variable != null)
                {
                    return variable;
                }
            }
            return null;
        }


        override public void Print(ISparqlPrinter p)
        {
            p.printKeyword("SERVICE");
            IVariable var = getServiceVariable();
            if (var != null)
            {
                p.print(" ");
                p.printVariable(var.getName());
            }
            else
            {
                Uri uri = getServiceURI();
                if (uri != null)
                {
                    p.print(" ");
                    p.printURIResource(Resource.Get(RDFUtil.CreateUriNode(uri), getModel()));
                }
            }
            printNestedElementList(p);
        }


        //override public void visit(IElementVisitor visitor)
        //{
        //    visitor.visit(this);
        //}
    }
}